Djokovic needed treatment after twisting his ankle against Clement
Third seed Novak Djokovic eased into the second round of the US Open despite needing treatment on an ankle injury during his win over Arnaud Clement.
The Serbian, beaten finalist here last year, was never at his best but was still far too strong for the Frenchman, winning 6-3 6-3 6-4.
A fired-up Andy Roddick demolished Fabrice Santoro in the night match.
Roddick served superbly as he swept past the 35-year-old French player 6-2 6-2 6-2 in one hour 27 minutes.
Meanwhile, Russian fifth seed Nikolay Davydenko shrugged off his recent poor form to beat Dudi Sela 6-3 6-3 6-3.
Davydenko has not won back-to-back matches since he triumphed at a low-key clay tournament in Warsaw in June but had no problems seeing off Sela.
His only wobble came when he was broken by the Israeli while serving for the match in the final set but he responded by wrapping up his victory in the next game.
I feel healthy, I feel strong
"Very surprising," was the Russian's verdict on his own performance.
"I played good for the first round, because I'm always nervous and confidence is not so great just in the beginning of the tournament."
France's Jo-Wilfried Tsonga beat Santiago Ventura 6-7 (3-7) 6-4 6-2 6-3.
Tsonga,the 19th seed, reached the Australian Open final in January but has seen his season wrecked by a knee injury and was in action for the first time since May.
"I feel healthy, I feel strong," said the 23-year-old. "I'm a little bit worried on my knee, and of course it's different than before.
"But I feel good and I can play tennis, so I play and I see."
Djokovic's biggest problem against Clement came when he landed awkwardly on his ankle while playing a forehand in the fourth game of the third set.
He needed assistance from a trainer but played on with heavy strapping on the problem area.
"It's OK," Djokovic said afterwards. "It's going to be good in two days, I'm sure.
"I was thinking more of it than I was really actually feeling the pain, so it's not really a big deal.
"In that certain moment, I felt big pain so I just had to tape the ankle. But it's going to be alright."
Spain's Nicolas Almagro, seeded 18th, also progressed after beating Frank Dancevic of Canada 6-3 6-4 7-5.
Russia's Dimitry Tursunov, the 26th seed, came through a battle with Argentina's Eduardo Schwank and eventually triumphed 7-5 4-6 7-5 7-6 (7-5).
But Serbia's Janko Tipsarevic was forced to retire injured midway through his first-round clash with Sam Warburg of the United States, who was leading 6-2 1-0.
Latvia's Ernest Gulbis, who turns 20 on Saturday,was too strong for Sweden's Thomas Johansson and won 7-5 6-1 7-6 (7-3).
Eighth seed Andy Roddick is in action against French veteran Fabrice Santoro in the night match on the Arthur Ashe Court.